@kalo11 - You probably should be able to decrypt your files even with a reformatted system, but we cannot know as we don't know IF there will be a decryptor ever released, if it will have that capability or not... so I cannot say.
@Nauman - no update yet - if there is an update, you and all other users will know. The GandCrab decryptor works. It was released last year for older versions. No one from this forum is to blame that you got ransomware, so the angry faces are unnecessary. Unfortunately, no solutions available.